Storm-petrel Oceanodroma monteiroi: new sp. from the Azores

Rund um unsere Aktivitäten auf den Azoren und Walschutz

Moderator: A-Team

Antworten
Benutzeravatar
Dr. Robert Hofrichter
Geschäftsführer
Geschäftsführer
Beiträge: 5606
Registriert: 08 Sep 2006 13:44
Kontaktdaten:

Storm-petrel Oceanodroma monteiroi: new sp. from the Azores

Beitrag von Dr. Robert Hofrichter » 06 Feb 2009 10:39

Monteiro’s Storm-petrel Oceanodroma monteiroi: a new species from the Azores

MARK BOLTON 1,2 *, ANDREA L. SMITH 3 , ELENA GÓMEZ-DÍAZ 4 , VICKI L. FRIESEN 3 , RENATA MEDEIROS 1 , JOËL BRIED 1 , JOSE L. ROSCALES 4 & ROBERT W. FURNESS 5

The existence of two seasonally distinct breeding populations of Oceanodroma storm-petrels
in the Azores islands was first documented in 1996. The discovery of morphological differences
between the populations led to the suggestion that they may represent cryptic sibling species.
Recent mtDNA and microsatellite analysis from storm-petrel populations has considerably
advanced our understanding of their taxonomic relationships. Here we present new
information on the timing of breeding and moult of the two Azores populations, the extent
of exchange of individuals between seasons, and diet from feather isotopes. We conclude
that the piiieps-season Azores population should be considered a new species for which we
propose the name Oceanodroma monteiroi, Monteiro’s Storm-petrel. The species is both
genetically distinct and genetically isolated from the sympatric cool-season population of
Madeiran Storm-petrel Oceanodroma castro, and from all other populations of Oceanodroma
castro in the Atlantic and Pacific Oceans examined to date. Differences in the vocalizations
permit species recognition, and the extent of primary feather wear and stage of moult aids
separation of the two species in the Azores, which is especially valuable during August when
both attend the breeding colonies in large numbers. Feather carbon and nitrogen isotopes
reveal that the diet of Monteiro’s Storm-petrel differs from that of the sympatric Madeiran
Storm-petrel during both breeding and non-breeding seasons, and unlike the Madeiran
Storm-petrel, Monteiro’s Storm-petrel appears to maintain the same foraging environment
during the summer and winter months, though it shows a dietary shift to higher trophic levels
during the non-breeding season. Monteiro’s Storm-petrel is thought to be confined to the
Azores archipelago, where it is currently known to nest on just two small neighbouring islets.
The total population size was estimated at 250-300 pairs in 1999.
Die ... Begeisterung, die wir beim Betrachten der Natur empfinden, ist eine Erinnerung an die Zeit, da wir Tiere, Bäume, Blumen und Erde waren ... das Wissen um unser Einssein mit allem, was die Zeit vor uns verborgen hält. Leo N. Tolstoi

Antworten

Zurück zu „Azoren - mare-mundi Aktivitäten“